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Found a weird fix for a dead laptop screen that actually worked | Electronics Repairers - Freelance Forum - The Community for Independent Professionals

david134•6mo ago

Found a weird fix for a dead laptop screen that actually worked

A customer brought in an old Dell laptop with a completely black screen, but the backlight was on. The usual steps like reseating the cable and checking the inverter didn't do anything. Out of pure frustration, I decided to try something I saw mentioned once in a forum years ago. I took a small piece of electrical tape and covered the first two pins on the LVDS cable connector on the motherboard side. This blocks the 'panel detect' signal. Plugged it back in, and the screen just lit up with a perfect picture. It's been running fine for a week now. I guess the internal circuit on the screen's controller board that handles that signal had failed. It feels like a hack, but it got the job done without needing a whole new panel. Has anyone else had success with this kind of workaround, or is it just asking for trouble down the line?

4 comments

4 Comments

the_jessica6mo ago

Wow, that's a perfect example of a workaround beating the "right" fix. So much stuff is held together by digital duct tape these days. Makes you wonder what else we could fix with a bit of clever hacking.

ray_burns606mo ago

Yeah, but where do you draw the line? At what point does the clever hack just make the whole system more fragile?

johnson.nora6mo ago

Honestly, that trick makes me wonder how many "dead" parts out there just have one tiny failed signal. We could be throwing away so much stuff that's almost fine.

charlieh744mo ago

I read somewhere that a lot of tech companies actually know about these single-failure issues but design it that way on purpose. They figure it's cheaper to just toss the whole board than train people to troubleshoot every little thing. There's a whole world of discarded electronics that's probably just one bad resistor or a cracked solder joint away from working fine. It's a shame because the raw materials and labor that went into those parts are just wasted. Makes you think twice before you toss something just because it stopped working.